TWI Digital Library

A model which considers heat transfer to both tool and workpiece was developed to predict temperature distributions for the friction stir welding (FSW) process. The model assumes a cylindrical pin generating heat at the interface by friction, and that the workpiece temperature does not exceed its melting temperature. The FSW process was considered in three stages: tool penetration; welding; and tool withdrawal. The complex system resulting from material movement was simplified by using a moving coordinate system, and the derived heat transfer equations for both the tool and the workpiece were solved numerically using a finite difference method. The model predictions for FSW welds of aluminium alloy 6061-T6 using a H13 tool steel tool are compared with experimental observations.

4th International Symposium, 14-16 May 2003, Poster Session, Paper 10